Question 1

Approximately how many magnitude 7 earthquakes occur each year?

Accepted Answer

A) one 
B) 10 
C) 100 
D) 1000 
A) one 
B) 10 
C) 100 
D) 1000

Question 2

Which of the following recent earthquakes killed the most people?

Accepted Answer

A) the 1989 Loma Prieta earthquake,northern California 
B) the 1994 Northridge earthquake,southern California 
C) the 1995 Kobe earthquake,Japan 
D) the 2001 Gujarat earthquake,India 
A) the 1989 Loma Prieta earthquake,northern California 
B) the 1994 Northridge earthquake,southern California 
C) the 1995 Kobe earthquake,Japan 
D) the 2001 Gujarat earthquake,India

Question 3

What does the elastic rebound theory explain?

Accepted Answer

A) how seismographs work 
B) how fault lines move 
C) how elastic rocks are 
D) why earthquakes occur 
A) how seismographs work 
B) how fault lines move 
C) how elastic rocks are 
D) why earthquakes occur

Question 4

Which of the following statements regarding aftershocks is true?

Accepted Answer

A) The number and sizes of aftershocks both decrease with time. 
B) The number of aftershocks decreases with time,while the sizes of aftershocks increase with time. 
C) The number of aftershocks increases with time,while the sizes of aftershocks decrease with time. 
D) The number and sizes of aftershocks both increase with time. 
A) The number and sizes of aftershocks both decrease with time. 
B) The number of aftershocks decreases with time,while the sizes of aftershocks increase with time. 
C) The number of aftershocks increases with time,while the sizes of aftershocks decrease with time. 
D) The number and sizes of aftershocks both increase with time.

Question 5

What does the elastic rebound theory describe?

Accepted Answer

A) the build-up and release of stress during an earthquake 
B) the fluctuations in groundwater prior to an earthquake 
C) the formation of mountain ranges by successive earthquakes 
D) the uplift of the crust in response to erosion 
A) the build-up and release of stress during an earthquake 
B) the fluctuations in groundwater prior to an earthquake 
C) the formation of mountain ranges by successive earthquakes 
D) the uplift of the crust in response to erosion

Question 6

Which of the following specifies the level of ground shaking that a structure must be able to withstand?

Accepted Answer

A) building code 
B) elastic rebound 
C) intensity scale 
D) magnitude scale 
A) building code 
B) elastic rebound 
C) intensity scale 
D) magnitude scale

Question 7

Fires that break out following an earthquake event are considered

Accepted Answer

A) primary hazards. 
B) secondary hazards. 
C) structural hazards. 
D) indirect hazards. 
A) primary hazards. 
B) secondary hazards. 
C) structural hazards. 
D) indirect hazards.

Question 8

The average time between large earthquake events along a fault is known as the ______ interval.

Accepted Answer

A) seismic 
B) hazard 
C) fault slip 
D) recurrence 
A) seismic 
B) hazard 
C) fault slip 
D) recurrence

Question 9

What type of seismic wave causes the most building damage?

Accepted Answer

A) P waves 
B) surface waves 
C) S waves 
D) All seismic waves cause equal amounts of building damage. 
A) P waves 
B) surface waves 
C) S waves 
D) All seismic waves cause equal amounts of building damage.

Question 10

Rocks subjected to ______ are ______.

Accepted Answer

A) strain; stressed 
B) strain; stretched 
C) stress; strained 
D) stress; stretched 
A) strain; stressed 
B) strain; stretched 
C) stress; strained 
D) stress; stretched

Question 11

Shallow,intermediate,and deep focus earthquakes occur at

Accepted Answer

A) divergent plate boundaries. 
B) transform plate boundaries. 
C) hot spots. 
D) convergent plate boundaries. 
A) divergent plate boundaries. 
B) transform plate boundaries. 
C) hot spots. 
D) convergent plate boundaries.

Question 12

The fault mechanism of an earthquake refers to the

Accepted Answer

A) the character of the fault. 
B) the way the rocks deformed during the earthquake. 
C) first motion of the fault (push up or down). 
D) the movement felt at the seismic station. 
A) the character of the fault. 
B) the way the rocks deformed during the earthquake. 
C) first motion of the fault (push up or down). 
D) the movement felt at the seismic station.

Question 13

Seismic ______ is typically shown on a map,whereas the seismic _______ is expressed in terms of loss of property and life.

Accepted Answer

A) risk; fault 
B) risk; damage 
C) damage; magnitude 
D) hazard; risk 
A) risk; fault 
B) risk; damage 
C) damage; magnitude 
D) hazard; risk

Question 14

Which of the following correctly lists the order in which seismic waves arrive at a seismograph station?

Accepted Answer

A) P waves,surface waves,S waves 
B) P waves,S waves,surface waves 
C) S waves,P waves,surface waves 
D) surface waves,P waves,S waves 
A) P waves,surface waves,S waves 
B) P waves,S waves,surface waves 
C) S waves,P waves,surface waves 
D) surface waves,P waves,S waves

Question 15

The 2004 Sumatra earthquake caused a surface displacement of the ocean floor on the order of

Accepted Answer

A) 10 m. 
B) 100 m. 
C) 40 m. 
D) 400 m. 
A) 10 m. 
B) 100 m. 
C) 40 m. 
D) 400 m.

Question 16

In the case of tsunamis,advance warnings can sometimes be sent because

Accepted Answer

A) tsunami waves come in pairs. 
B) sound waves travel ahead of the tsunami. 
C) seismic waves travel faster than tsunamis. 
D) airline pilots who witness tsunamis can call ahead. 
A) tsunami waves come in pairs. 
B) sound waves travel ahead of the tsunami. 
C) seismic waves travel faster than tsunamis. 
D) airline pilots who witness tsunamis can call ahead.

Question 17

Rocks that undergo elastic deformation will

Accepted Answer

A) return to their original shape once the stress is released. 
B) cause a large magnitude earthquake. 
C) undergo permanent deformation. 
D) cause a small magnitude earthquake. 
A) return to their original shape once the stress is released. 
B) cause a large magnitude earthquake. 
C) undergo permanent deformation. 
D) cause a small magnitude earthquake.

Question 18

As the distance to an earthquake increases,

Accepted Answer

A) the elapsed time before the P waves arrive decreases. 
B) the time between the arrival of the P and S waves increases. 
C) the amount of ground shaking increases. 
D) the time between the arrival of the P and S waves decreases. 
A) the elapsed time before the P waves arrive decreases. 
B) the time between the arrival of the P and S waves increases. 
C) the amount of ground shaking increases. 
D) the time between the arrival of the P and S waves decreases.

Question 19

When tensional forces act on a fault plane,they produce

Accepted Answer

A) reverse faults. 
B) normal faults. 
C) strike slip faults. 
D) compression faults. 
A) reverse faults. 
B) normal faults. 
C) strike slip faults. 
D) compression faults.

Question 20

The number of worldwide earthquakes _________ as the magnitude increases?

Accepted Answer

A) increases two-fold 
B) increases 10-fold 
C) decreases two-fold 
D) decreases 10-fold 
A) increases two-fold 
B) increases 10-fold 
C) decreases two-fold 
D) decreases 10-fold

Exam 13: Earthquakes

Approximately how many magnitude 7 earthquakes occur each year?

Which of the following recent earthquakes killed the most people?

What does the elastic rebound theory explain?

Which of the following statements regarding aftershocks is true?

What does the elastic rebound theory describe?

Which of the following specifies the level of ground shaking that a structure must be able to withstand?

Fires that break out following an earthquake event are considered

The average time between large earthquake events along a fault is known as the ______ interval.

What type of seismic wave causes the most building damage?

Rocks subjected to ______ are ______.

Shallow,intermediate,and deep focus earthquakes occur at

The fault mechanism of an earthquake refers to the

Seismic ______ is typically shown on a map,whereas the seismic _______ is expressed in terms of loss of property and life.

Which of the following correctly lists the order in which seismic waves arrive at a seismograph station?

The 2004 Sumatra earthquake caused a surface displacement of the ocean floor on the order of

In the case of tsunamis,advance warnings can sometimes be sent because

Rocks that undergo elastic deformation will

As the distance to an earthquake increases,

When tensional forces act on a fault plane,they produce

The number of worldwide earthquakes _________ as the magnitude increases?

The Earth System

Plate Tectonics: The Unifying Theory

Earth Materials: Minerals and Rocks

Igneous Rocks: Solids From Melts

Sedimentation: Rocks Formed by Surface Processes

Metamorphism: Alteration of Rocks by Temperature and Pressure

Deformation: Modification of Rocks by Folding and Fracturing

Clocks in Rocks: Timing the Geologic Period

Early History of the Terrestrial Planets

History of the Continents

Geobiology: Life Interacts With Earth

Volcanoes

Exploring Earths Interior

The Climate System

Weathering,erosion,and Mass Wasting: Interactions Between the Climate and Plate Tectonic Systems

The Hydrologic Cycle and Groundwater

Stream Transport: From Mountains to Oceans

Winds and Deserts

Coastlines and Ocean Basins

Glaciers: the Work of Ice

Landscapes: Tectonic and Climate Interaction

The Human Impact of Earths Environment

Filters

Rocks subjected to are .

Seismic is typically shown on a map,whereas the seismic _ is expressed in terms of loss of property and life.